Microcontroller-based interface circuit for inductive sensors
| Contribuinte(s) |
Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica Universitat Politècnica de Catalunya. e-CAT - Transductors i Circuits Electrònics |
|---|---|
| Resumo |
This work proposes a fully-digital interface circuit for the measurement of inductive sensors using a low-cost microcontroller (µC) and without any intermediate active circuit. Apart from the µC and the sensor, the circuit just requires an external resistor and a reference inductance so that two RL circuits with a high-pass filter (HPF) topology are formed. The µC appropriately excites such RL circuits in order to measure the discharging time of the voltage across each inductance (i.e. sensing and reference) and then it uses such discharging times to estimate the sensor inductance. Experimental tests using a commercial µC show a non-linearity error (NLE) lower than 0.5%FSS (Full-Scale Span) when measuring inductances from 1 mH to 10 mH, and from 10 mH to 100 mH. Peer Reviewed Postprint (published version) |
| Identificador | |
| Idioma(s) |
eng |
| Direitos |
Open Access |
| Palavras-Chave | #Àrees temàtiques de la UPC::Enginyeria electrònica i telecomunicacions::Microelectrònica #Àrees temàtiques de la UPC::Enginyeria electrònica i telecomunicacions::Instrumentació i mesura::Sensors i actuadors #Detectors #Electronic controllers #Microelectronics #Inductive sensor #microcontroller #sensor electronic interface #Sensors #Microcontroladors |
| Tipo |
info:eu-repo/semantics/other |
